Nitrogeneous bases
sugar
phosphate group
Answer:
Some substance in the infectious S strain could change the harmless R strain into the more lethal form.
Explanation:
These first type of experiments where crucial to advance in DNA knowledge.
In one experiment, they treated the material with enzymes that destroy all proteins. This is important because scientist notice that there was something else that was causing the strain to change into a lethal form and was heritable (DNA). Know a days we know that plasmids are responsible for such transformation.
It would change too because the reaction is based on the enzyme.
Answer:
pathogens
Explanation:
pathogens may occur in various way e.g spread from a person to person by directly body contact